@Book{BioNLP-ST:2011,
  editor    = {Jun'ichi Tsujii  and  Jin-Dong Kim  and  Sampo Pyysalo},
  title     = {Proceedings of BioNLP Shared Task 2011 Workshop},
  month     = {June},
  year      = {2011},
  address   = {Portland, Oregon, USA},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/W11-18}
}